Pith Number

pith:QWLRWPSP

pith:2008:QWLRWPSP4P3G3CBDV3UND7R2YR

not attested not anchored not stored refs pending

Hamiltonization of Nonholonomic Systems and the Inverse Problem of the Calculus of Variations

A.M. Bloch, O.E. Fernandez, T. Mestdag

arxiv:0812.0437 v1 · 2008-12-02 · math-ph · math.MP

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QWLRWPSP4P3G3CBDV3UND7R2YR}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T02:15:12.276260Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85971b3e4fe3f66d8823aee8d1fe3ac470563ebe9b9482302c9774fea1eabfec

Aliases

arxiv: 0812.0437 · arxiv_version: 0812.0437v1 · doi: 10.48550/arxiv.0812.0437 · pith_short_12: QWLRWPSP4P3G · pith_short_16: QWLRWPSP4P3G3CBD · pith_short_8: QWLRWPSP

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/QWLRWPSP4P3G3CBDV3UND7R2YR \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 85971b3e4fe3f66d8823aee8d1fe3ac470563ebe9b9482302c9774fea1eabfec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7f07f5718cdc378ddd838ba170635fa7a53c86cddca4459630cc6f507dd7cde9",
    "cross_cats_sorted": [
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math-ph",
    "submitted_at": "2008-12-02T08:16:01Z",
    "title_canon_sha256": "481eda2ff6366ecbc7164b9e218fe46ac1ed3580ed14cccac36b42de7e71e4d1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0812.0437",
    "kind": "arxiv",
    "version": 1
  }
}